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Grand Seiko GMT Limited Edition (SBGM031) Luxury Watch Review

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The “Grand Seiko GMT Limited Edition (SBGM031) Luxury Watch Review” provides an in-depth analysis of this exquisite timepiece. The watch features a stainless steel case with a striking blue dial, complemented by a black alligator leather strap. With functions including hours, minutes, seconds, GMT, and date, the watch is both visually appealing and highly practical. Measuring 39.5mm in size and 14.1mm in thickness, the Grand Seiko GMT SBGM031 is suitable for wrists of varying sizes. To learn more about this limited edition watch, watch the full review on our website and explore our latest collection of pre-owned luxury watches at

Hi, I’m Tim, and I’d like to welcome you to our channel. If you enjoyed this review, make sure to subscribe to our YouTube channel at WatchBox Reviews for daily updates. If you’re interested in purchasing the Grand Seiko GMT SBGM031, you can find it on our website, This 10th anniversary limited edition model boasts a stainless steel construction and a timeless design that remains relevant even today. With its compact size and refined details, this watch is perfect for both casual and formal occasions. The dial, featuring hand-applied indices and a rich blue lacquer base, adds depth and elegance to the overall aesthetic. Equipped with a self-winding Caliber 9s 66 movement, this watch offers precise timekeeping and a 72-hour power reserve. With its impeccable craftsmanship and versatile design, the Grand Seiko GMT SBGM031 is a timepiece truly deserving of its prestigious name.

Grand Seiko GMT Limited Edition (SBGM031) Luxury Watch Review

Design and Materials

Case and strap

The case of the watch is a key component of its overall design. It is typically made of high-quality stainless steel, which offers durability and resistance to corrosion. The design of the case can vary, ranging from sleek and minimalistic to more intricate and detailed. Some watches may also feature a case made of precious metals, such as gold or platinum, adding a touch of luxury to the timepiece. The strap of the watch is another important element of its design. It is usually made of leather, metal, or synthetic materials. The choice of strap material depends on the desired look and feel of the watch, as well as the level of comfort it provides.

Buckle and clasp

The buckle or clasp of the watch strap serves as both a functional and aesthetic component. It helps secure the watch onto the wrist and can be adjusted to ensure a comfortable fit. The buckle or clasp is typically made of stainless steel, matching the overall material of the watch case. Some high-end watches may feature a deployant clasp, which provides added security and is easier to operate compared to a traditional buckle.

Dial design and detail

The dial is the face of the watch, displaying the time and other functions. The design of the dial can vary greatly, with options ranging from clean and minimalist to more intricate and detailed. The choice of dial design often reflects the overall aesthetic of the watch, whether it be a classic dress watch or a robust sports watch. The dial may feature hour markers, such as numerals or indices, to indicate the different hours. It can also incorporate additional elements, such as sub-dials for measuring different time intervals or a textured background to add visual interest.

Hands and indices

The hands and indices on a watch play a crucial role in indicating the time accurately. The hands, typically shaped as slender sticks, indicate the hours, minutes, and seconds on the dial. They are often made of polished metal to enhance visibility against the dial background. The indices, on the other hand, are hour markers that help delineate the hours. They can take various forms, including simple lines, numerals, or even intricate designs. The hands and indices are essential design elements that contribute to the overall aesthetics and functionality of the watch.

Features and Functions

Hours, minutes, and seconds

The fundamental function of a watch is to indicate the time accurately, and this is achieved through the hours, minutes, and seconds hands. The hours hand points to the current hour, while the minutes hand indicates the minutes that have passed since the last hour. The seconds hand continuously moves around the dial, indicating the passage of seconds. The combination of these hands allows for precise timekeeping, ensuring that you can rely on your watch to keep track of time.

GMT function

Some watches incorporate a GMT (Greenwich Mean Time) function, which enables the wearer to simultaneously track two time zones. This can be particularly useful for frequent travelers or individuals who need to coordinate with people in different time zones. The GMT hand, often displayed as an additional hand on the dial, can be set to a different time zone, allowing for quick and easy reference to an alternate time.

Date display

Many watches feature a date display function, which provides the convenience of knowing the current date at a glance. The date is typically indicated through a small window on the dial, often located at the 3 o’clock or 6 o’clock position. Some watches may also incorporate a day of the week display, further enhancing the practicality and usefulness of the timepiece.

Movement details

The movement of a watch refers to the internal mechanism responsible for its timekeeping functions. There are two main types of movements: mechanical and quartz. Mechanical movements are more traditional and involve a series of gears and springs to power the watch. Quartz movements, on the other hand, rely on a battery to power a vibrating quartz crystal, which provides precise timekeeping. The choice between mechanical and quartz movements depends on personal preference and desired level of accuracy.

Water resistance

Water resistance is an important feature to consider when choosing a watch, especially if you lead an active lifestyle or plan to wear the watch in wet environments. The water resistance of a watch is measured in meters and indicates the amount of pressure the watch can withstand without leaking water. A watch with a water resistance rating of 30 meters is suitable for everyday wear and can withstand splashes or brief submersion in water. It is important to note that water resistance is not a permanent feature of a watch and may diminish over time. Regular maintenance and proper care are essential to ensure the longevity of the water resistance.

Size and Fit

Case diameter

The case diameter refers to the width of the watch case, measured from one side to the other. It plays a significant role in determining the overall size and presence of the watch on the wrist. The diameter can range from smaller, more dainty sizes, typically around 36mm for women’s watches, to larger, more robust sizes, often exceeding 40mm for men’s watches. The choice of case diameter depends on personal preference, the intended use of the watch, and individual wrist size.

Lug-to-lug length

The lug-to-lug length of a watch measures the distance between the lugs, which are the extensions on the case that hold the strap or bracelet in place. This measurement is crucial in ensuring a proper fit on the wrist. A lug-to-lug length that is too short may result in the watch sitting too tightly on the wrist, while a lug-to-lug length that is too long may cause the watch to hang loosely. It is important to consider the lug-to-lug length along with the case diameter to ensure a comfortable and balanced fit.


The thickness of a watch case refers to its height when viewed from the side. It is an important element to consider, as it can impact the overall comfort and wearability of the watch. A thicker watch may feel more substantial on the wrist and have a more pronounced presence, while a thinner watch can provide a sleeker and more understated look. The choice of thickness depends on personal preference and the intended use of the watch.

Suitable wrist sizes

When choosing a watch, it is important to consider the fit on your wrist. Watches come in various sizes to accommodate different wrist sizes, and finding the right fit is essential for both comfort and aesthetics. A watch that is too large for your wrist may feel cumbersome and unbalanced, while a watch that is too small may appear disproportionately small and may not provide the desired level of visibility. Consider trying on the watch or utilizing size guides provided by the manufacturer to determine the most suitable watch size for your wrist.

Case Finishing

Surat su polishing

Surat su polishing is a traditional Japanese technique used to achieve a high level of finishing on watch cases. It involves meticulous hand polishing, which results in a flawless and mirror-like surface. This technique not only enhances the aesthetics of the watch but also provides an increased level of protection against scratches and wear. The surat su polishing technique is often utilized on high-end watches to achieve a premium and luxurious look.

Lug and case band junction

The lug and case band junction is an area where the lugs of the case meet the main body or band of the watch. This junction is an important design element as it contributes to the overall aesthetics and comfort of the watch. A well-executed lug and case band junction ensures a seamless transition between these components, creating a cohesive and visually appealing design. It also plays a role in the comfort of the watch, as a smooth and well-finished junction can prevent any discomfort or irritation on the wrist.

Dial and Indices

Hand-applied indices

Hand-applied indices are hour markers that have been individually placed on the dial by skilled craftsmen. This meticulous technique adds a level of attention to detail and craftsmanship to the watch. Hand-applied indices are often made of high-quality materials, such as gold or silver, and are polished to enhance their visual appeal. This technique results in a three-dimensional effect, as the indices sit above the dial surface, adding depth and dimension to the overall design.

Double finish

The double finish refers to the combination of different finishing techniques applied to the dial. This technique involves contrasting textures or finishes on various elements of the dial, creating visual interest and enhancing legibility. For example, the main dial surface may feature a sunburst finish, which catches the light and creates a play of reflections, while the sub-dials may have a smooth matte finish to provide a contrast. The double finish technique adds a layer of sophistication and complexity to the dial design.

Depth effect

The depth effect on a watch dial refers to the illusion of depth created through various design elements. This effect can be achieved through the use of different dial layers, three-dimensional indices, or intricate patterns. The combination of these elements creates a visually captivating dial, with certain elements appearing closer or further away than others. The depth effect not only enhances the aesthetics of the watch but also contributes to the overall readability and legibility of the dial.

Functions and Operation

Hacking more stop seconds

The hacking or stop seconds function allows for precise time setting on a mechanical watch. When the crown is pulled out, the second hand stops, enabling the wearer to set the time accurately to the desired minute. This feature is particularly useful when synchronizing the watch with other timekeeping devices or when precise timekeeping is required. The hacking or stop seconds function adds a level of convenience and accuracy to the operation of the watch.

Split time displays

Split time displays, also known as chronographs, allow the wearer to measure and track elapsed time. This function is achieved through the use of additional sub-dials, typically located on the main dial. The sub-dials can measure seconds, minutes, and hours, providing versatility and functionality to the timepiece. Split time displays are often utilized in sports or timing activities, enabling the wearer to accurately time events or track multiple time intervals simultaneously.

Independent hour hand

Some watches incorporate an independent hour hand function, which enables the adjustment of the hour hand independently of the minutes and seconds hands. This function is useful when traveling across different time zones, allowing for quick and easy time adjustment without affecting the accuracy of the minutes and seconds. The independent hour hand function provides added convenience and utility to the watch, particularly for frequent travelers or individuals who frequently change time zones.

Date adjustment

The date adjustment function allows for the quick and easy adjustment of the date display on the watch. This feature is typically achieved through a dedicated crown position or a pusher located on the side of the case. The date adjustment function ensures that the watch remains accurate and up to date, providing convenience and practicality to the wearer. It is important to follow the manufacturer’s instructions when adjusting the date to avoid any potential damage to the watch movement.

Movement and Power Reserve

Grand Seiko Caliber 9s 66

The Grand Seiko Caliber 9s 66 is an example of a high-quality mechanical movement used in luxury watches. It is known for its precision and reliability, offering accurate timekeeping and a smooth sweep of the seconds hand. The Caliber 9s 66 movement incorporates advanced technologies and innovative design elements, ensuring optimal performance and longevity. It is a testament to the craftsmanship and attention to detail that Grand Seiko is known for.

Power reserve of 72 hours

The power reserve of a watch refers to the amount of time it can operate without being wound or worn. The Grand Seiko Caliber 9s 66 movement has a power reserve of 72 hours, meaning it can continue to function for three days without requiring additional winding. This extended power reserve is particularly useful for individuals who rotate their watches or have multiple timepieces in their collection. It ensures that the watch remains powered and accurate even after a few days of non-usage.

Accuracy and chronometer certification

Accuracy is a crucial aspect of any timepiece. The Grand Seiko Caliber 9s 66 movement is known for its exceptional accuracy, meeting the stringent standards set by the brand. Some movements, including the Caliber 9s 66, undergo rigorous testing and are awarded chronometer certification. This certification is a testament to the precision and reliability of the movement, ensuring that the watch maintains accurate timekeeping within specific tolerances. Chronometer certification provides peace of mind to the wearer, knowing that their watch has been tested and certified for its accuracy.

Water Resistance

30-meter water resistance

The water resistance of a watch is an important consideration, particularly if you plan to wear the watch in wet or humid environments. The 30-meter water resistance rating indicates that the watch can withstand splashes or brief immersion in water. It is suitable for everyday wear and provides a certain level of protection against accidental water exposure. It is important to note that water resistance ratings are not indicative of the watch’s suitability for swimming, diving, or other aquatic activities.

Not suitable for aquatic activities

Despite having a water resistance rating, it is essential to note that the watch is not suitable for aquatic activities such as swimming or diving. Water resistance ratings are determined under controlled conditions and do not take into account factors such as water pressure, temperature, or movement in water. Engaging in aquatic activities with a watch that is not specifically designed for such purposes may result in water damage and void any warranty provided by the manufacturer. It is always recommended to consult the manufacturer’s guidelines and recommendations for the specific water resistance capabilities of your watch.

Aesthetic Versatility

Suitable for any occasion

The aesthetic versatility of a watch refers to its ability to suit various occasions and styles. A well-designed watch can seamlessly transition from formal events to casual outings, providing versatility and flexibility in its wearability. The choice of materials, colors, and design elements can greatly contribute to the aesthetic versatility of a watch. For example, a stainless steel case and a classic dial design can lend a sophisticated and timeless look to the watch, making it suitable for formal occasions. On the other hand, a watch with a sporty design and a rubber strap may be more appropriate for casual or outdoor activities.

Wide range of wearers

A high-quality watch should be versatile enough to be worn by a wide range of wearers. The design and proportions of the watch should be suitable for different wrist sizes and styles. The choice of case diameter, lug-to-lug length, and strap options can influence the wearability of the watch for different individuals. A watch that caters to a wide range of wearers ensures that it can be enjoyed by various individuals, regardless of gender, age, or personal style.

Assembly, Regulation, and Servicing

Watchmaker assembly

The assembly of a watch involves the intricate process of putting together various components to create a functional timepiece. Skilled watchmakers carefully assemble each watch, ensuring that all components are aligned and functioning correctly. The assembly process requires precision and attention to detail, as even the smallest misalignment can affect the overall performance of the watch. The expertise and craftsmanship of the watchmaker play a crucial role in ensuring a high-quality and reliable timepiece.

Watchmaker regulation

Watchmaker regulation is the process of fine-tuning the movement of a watch to ensure optimal accuracy. During the regulation process, the watchmaker carefully adjusts various components and mechanisms to achieve the desired level of precision. This meticulous adjustment allows the watch to keep time with utmost accuracy, reducing any potential deviations. Regular regulation by a skilled watchmaker is recommended to maintain the accuracy and performance of the watch.

Watchmaker servicing

Regular servicing by a skilled watchmaker is crucial to ensure the longevity and proper functioning of a watch. Over time, components of the watch may wear out, lubricants may dry up, or dust and dirt may accumulate, affecting the performance of the timepiece. A watchmaker servicing involves disassembling the watch, cleaning and replacing worn-out components, lubricating the movement, and reassembling the watch. This comprehensive servicing restores the watch to its optimal condition, ensuring its longevity and reliability. It is recommended to follow the manufacturer’s guidelines and recommendations for servicing intervals to ensure the continued performance of the watch.

In conclusion, a watch is a complex timepiece that incorporates various design elements, functions, and features. The design and materials of a watch, such as the case and strap, buckle and clasp, dial design and detail, and hands and indices, contribute to its overall aesthetic and functionality. The features and functions, including hours, minutes, and seconds, GMT function, date display, movement details, and water resistance, enhance the practicality and versatility of the watch. The size and fit of the watch, along with the case finishing, dial and indices, and functions and operation, ensure a comfortable and well-balanced wear. The movement and power reserve, water resistance, and aesthetic versatility further enhance the appeal and functionality of the watch. Lastly, the assembly, regulation, and servicing by skilled watchmakers play a crucial role in maintaining the performance and longevity of the watch. Overall, a well-designed and carefully crafted watch offers both style and functionality, making it a timeless accessory for any watch enthusiast.

I'm, your trusted guide to the captivating world of horology. At Mt. Watches, I am dedicated to providing you with a wealth of knowledge and resources when it comes to timepieces. Regardless of your expertise level, whether you're just starting your horological journey or have a refined taste for luxury watches, I have tailor-made content for you. My comprehensive guides, informative how-to articles, and expert reviews are carefully curated to enlighten, educate, and inspire you. From delving into the complexities of watch mechanics to staying updated on the freshest trends in luxury wristwear, your exploration of time begins and reaches the pinnacle of wisdom here at Mt. Watches.

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